Specification:Name: Single Diaphragm / Double Diaphragm CouplingMaterial: Aviation Aluminum AlloyPrecision: H7Operating Temperature: -80℃~80℃Outer Diameter(D): 68-94mmLength(L): 53-98mmBore: The size of the bore at either ends would be matched at willWhen putting an order, please notice the size of the internal hole at either ends.D68L53-Bore (16 to 35)D82L68-Bore (16 to 40)D94L68-Bore (25 to 50)D68L74-Bore (16 to 35)D82L98-Bore (18 to 40)D94L98-Bore (25 to 40)Package :Packing : Plastic bag / Carton box.Quantity : According to your Choose!